Question: Mention the unit to measure the physical quantity named as frequency
Paraphrase: Specify the unit to degree the physical amount named as frequency
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P111 wd:Q11652 . ?sbj wdt:P31 wd:Q47574 } 
Answer: Fresnel, reciprocal second, attohertz, zettahertz, yottahertz, yoctohertz, zeptohertz, reciprocal megaannum